Recommendation of the latest HTTP framework in the Java class library
The HTTP framework recommended in the latest Java library is the HTTPClient introduced by Java 11.HTTPClient provides a modern, flexible and functional way to perform HTTP communication.It is based on the URLConnection and HTTPURLCONNECTION, which existed in the Java standard library, and can also use the functions of Java 8, such as CompletableFuture and flow.The characteristics and use examples of httpclient will be introduced in detail below.
The characteristics of httpclient:
1. Support HTTP/1.1 and HTTP/2 protocols, as well as WebSocket.
2. Provide two methods of synchronization and asynchronous to send HTTP requests.
3. Support streaming operation, making it more convenient for requests and responses.
4. Support connection pool management, you can reuse the connection to improve performance.
5. Provide rich configuration options, such as proxy, timeout, retry strategy, etc.
6. Support HTTP/2 relics and improve the performance of concurrent requests.
Here are some examples of examples using httpclient:
1. Send GET request:
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class HttpClientExample {
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.GET()
.uri(URI.create("https://api.example.com/data"))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.statusCode());
System.out.println(response.body());
}
}
2. Send post request:
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpHeaders;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.http.HttpRequest.BodyPublishers;
public class HttpClientExample {
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.POST(BodyPublishers.ofString("data=example"))
.header("Content-Type", "application/x-www-form-urlencoded")
.uri(URI.create("https://api.example.com/post"))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.statusCode());
System.out.println(response.body());
}
}
3. Asynchronous sending request:
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.concurrent.CompletableFuture;
public class HttpClientExample {
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.GET()
.uri(URI.create("https://api.example.com/data"))
.build();
CompletableFuture<HttpResponse<String>> future = client.sendAsync(request, HttpResponse.BodyHandlers.ofString());
future.thenAccept(response -> {
System.out.println(response.statusCode());
System.out.println(response.body());
});
future.join();
}
}
The above is some basic usage examples of HTTPClient. You can perform more complicated operations according to actual needs.HTTPClient provides powerful functions, becoming the HTTP framework recommended in the Java class library.
